To be put out by hitting a ground ball that is fielded and thrown to first base.
打滾地球出局：因打出的滾地球被截或被擲回一壘而出局
existing (or not existing) in large numbers or amounts
為數(shù)眾多（或?yàn)閿?shù)不多）
new textbooks on particle physics are thin on the ground.
粒子物理學(xué)的新教材為數(shù)不多。
do preparatory digging or other work prior to building or planting something
翻土，犁地；破土，動(dòng)工
another term for break new ground below
同后面 break new ground
do something innovative which is considered an advance or positive benefit
開(kāi)辟新天地，創(chuàng)新
do something which leaves someone without a reason or justification for their actions or opinions
使（某人的）行為無(wú)正當(dāng)理由，使（某人的）觀點(diǎn)無(wú)據(jù)可依
become more popular or accepted
越來(lái)越得人心，越來(lái)越為人們所接受
new moral attitudes are gaining ground.
新的道德觀越來(lái)越為人們所接受。
get closer to someone or something one is pursuing or with whom one is competing
逼近（追趕對(duì)象，競(jìng)爭(zhēng)對(duì)手），追上
the dollar gained ground on all other major currencies.
美元已趕上所有其他主要貨幣。
(informal)become part of an enterprise in its early stages
(非正式)在企業(yè)的草創(chuàng)階段加入
start or cause to start happening or functioning successfully
（使）順利開(kāi)始；（使）起作用
he doesn't appreciate the steps he must take to get the negotiations off the ground.
他不喜歡自己為使談判得以開(kāi)始而不得不采取的那些步驟。
retreat or lose one's advantage during a conflict or competition
讓步；退卻；失去優(yōu)勢(shì)
he refused to give ground on this issue.
他拒絕在這一問(wèn)題上讓步。
(of a fox or other animal) enter its earth or burrow
（狐貍等）鉆入地穴
not retreat or lose one's advantage during a conflict or competition
不讓步；不退卻；保持優(yōu)勢(shì)
you will be able to hold your ground and resist the enemy's attack.
你將能夠堅(jiān)守陣地并抵御敵人的進(jìn)攻。
get closer to someone ahead in a race or competition
追近，趕上
in a place where real, practical work is done
在現(xiàn)場(chǎng)，在實(shí)地
the troops on the ground are cynical.
戰(zhàn)地的部隊(duì)只顧自身的安危。