Definition: A weak reason, argument, or excuse is one that you do not have enough proof to support. Level: B2
他迟到的借口很薄弱，没有说服力。
His excuse for being late was ___weak and unconvincing.
没有足够的证据，她的论点显得很弱。
Without sufficient evidence, her argument appeared ___weak.
委员会因推理薄弱而拒绝了该提案。
The committee rejected the proposal due to its ___weak reasoning.
